Datasheet

SN54ABT8245, SN74ABT8245
SCAN TEST DEVICES
WITH OCTAL BUS TRANSCEIVERS
SCBS124D – AUGUST 1992 – REVISED DECEMBER 1996
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54ABT8245 SN74ABT8245
UNIT
MIN MAX MIN MAX
UNIT
V
CC
Supply voltage 4.5 5.5 4.5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
V
I
Input voltage 0 V
CC
0 V
CC
V
I
OH
High-level output current –24 –32 mA
I
OL
Low-level output current 48 64 mA
∆t/∆v Input transition rise or fall rate 10 10 ns/V
T
A
Operating free-air temperature –55 125 –40 85 °C
NOTE 3: Unused pins (input or I/O) must be held high or low to prevent them from floating.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
= 25°C SN54ABT8245 SN74ABT8245
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN MAX MIN MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 –1.2 V
V
CC
= 4.5 V, I
OH
= – 3 mA 2.5 2.5 2.5
V
OH
V
CC
= 5 V, I
OH
= – 3 mA 3 3 3
V
V
OH
V
CC
= 4.5 V, I
OH
= – 24 mA 2 2
V
V
CC
= 4.5 V, I
OH
= – 32 mA 2* 2
V
OL
V
CC
= 4.5 V, I
OL
= 48 mA 0.55 0.55
V
V
OL
V
CC
= 4.5 V, I
OL
= 64 mA 0.55* 0.55
V
I
I
V
CC
= 5.5 V,
DIR, OE, TCK ±1 ±1 ±1
µA
I
I
CC
,
V
I
= V
CC
or GND
A or B ports ±100 ±100 ±100
µ
A
I
IH
V
CC
= 5.5 V, V
I
= V
CC
TDI, TMS 10 10 10 µA
I
IL
V
CC
= 5.5 V, V
I
= GND TDI, TMS –40 –160 –40 –160 –40 –160 µA
I
OZH
‡
V
CC
= 5.5 V, V
O
= 2.7 V 50 50 50 µA
I
OZL
‡
V
CC
= 5.5 V, V
O
= 0.5 V –50 –50 –50 µA
I
OZPU
V
CC
= 0 to 2 V, V
O
= 0.5 V or 2.7 V ±50 ±50 ±50 µA
I
OZPD
V
CC
= 2 V or 0, V
O
= 0.5 V or 2.7 V ±50 ±50 ±50 µA
I
off
V
CC
= 0, V
I
or V
O
≤ 4.5 V ±100 ±100 µA
I
CEX
V
CC
= 5.5 V, V
O
= 5.5 V Outputs high 50 50 50 µA
I
O
§
V
CC
= 5.5 V, V
O
= 2.5 V –50 –100 –180 –50 –180 –50 –180 mA
V
CC
= 5.5 V
,
AB
Outputs high 0.9 2 2 2
I
CC
V
CC
5.5
V,
I
O
= 0,
A or B
p
orts
Outputs low 30 38 38 38
mA
V
I
= V
CC
or GND
orts
Outputs disabled 0.9 2 2 2
∆I
¶
V
CC
= 5.5 V, One input at 3.4 V,
15
15
15
mA
∆I
CC
¶
CC
,,
Other inputs at V
CC
or GND
1
.
5
1
.
5
1
.
5
mA
C
i
V
I
= 2.5 V or 0.5 V Control inputs 3 pF
C
io
V
O
= 2.5 V or 0.5 V A or B ports 10 pF
C
o
V
O
= 2.5 V or 0.5 V TDO 8 pF
* On products compliant to MIL-PRF-38535, this parameter does not apply.
†
All typical values are at V
CC
= 5 V.
‡
The parameters I
OZH
and I
OZL
include the input leakage current.
§
Not more than one output should be tested at a time, and the duration of the test should not exceed 1 second.
¶
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.